thanks
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haha, misread one info. The revised answer -->
-ppzcgg-
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02/21/2007 postreply
10:50:31
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2) C(18, 3) × C(15, 3) × C(12, 3) × C(9, 3) × C(6, 3) × C(3
-ppzcgg-
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02/21/2007 postreply
11:45:40